Once considered an elite prospect, Brett Wallace now has few lingering believers.  The 2008 1st round pick has already been with four organizations, and is currently passing time in the Pacific Coast League at Oklahoma City, Triple-A affiliate of the Astros.  Houston gave Wallace ample opportunity to prove his worth in 2011, but he effectively squandered the 350+ PA, posting a .259 AVG and a .110 ISO, which is pretty miserable coming from a 1B.  During a brief stint in the bigs earlier this year, the 25-year-old was much improved, batting .333/.429/.583 in 42 PA.  Granted, it’s a small sample, but it conjured memories of why we touted Wallace in the first place — outstanding plate coverage, lightning-quick hands, beautiful lefty stroke, advanced approach, power potential… the works, really, from a hitting perspective.  Jeff Luhnow — Houston’s brilliant 1st-year GM, and the man who drafted Wallace in 2008 while handling player procurement for the Cardinals — recently acknowledged that the first baseman should resurface in the bigs before long, which is kind of an ambiguous timetable.  Regardless, Wallace’s Triple-A production has been big of recent (.371/.476/.600 through last ten), and he could be useful in NL-Only and deep mixed formats should he return to Houston anytime soon.